managed switch - redundancy features

Connexium Managed Switches - Redundancy Capabilities

Schneider Electric 2- Connectivity Products – Joe Benedetto – 12/14/2010

●The goal of network redundancy is to provide high network availability with automatic communication recovery in the event of a broken or unplugged cable or the shut down of a switch.

●The network recovery includes the time for the network to automatically reconfigure the communication path to all devices and reinitiate communications

●Redundant networks are typically configured in either a ring or mesh architecture depending on the selected redundancy protocol.

●All switches and devices on the network must support the same redundancy protocol

●The Connexium Managed Switches support several Redundancy Protocols that can be selected as part of the switch configuration process.

Connexium Managed SwitchRedundancy


HIPER-Ring

•Only Schneider switches•Ability to couple rings.•Fast HIPER-Ring option with Extended Switches

RSTP(Rapid Spanning Tree)

•RSTP compatible switches can be used. •Multiple paths between devices are established.

MRP

•MRP-compatible switch can be used. •Ability to couple rings.

Redundancy ProtocolsConnexium switches offer 3 different protocols to support networkredundancy for High Availability


Connexium Managed Switch

●RSTP (Rapid Spanning Tree Protocol) - Industry standard protocol

(IEEE 802.1) enabling deployment of ring and mesh architectures.

●MRP ( Media Redundancy Protocol) - An IEC standard (IEC 62439) enabling deployment of ring architectures.

●HIPER-Ring (High Performance Redundancy) - A propriety protocol for ring configurations. Fast HIPER-Ring available with the extended switches

●Ring Coupling – Interconnecting 2 ring that are using either the MRP or HIPER-Ring protocols.

●Dual Input Power Supply - Dual power source connections to the switch power supply.

Redundancy Capabilities



●The web page below allows the selection of the network redundancy capability that includes:

● Ring Redundancy using the HIPER-Ring and MRP protocols

● Ring/Network Coupling

● Rapid Spanning Tree using RSTP protocol

Redundancy Capabilities Selection



●Ring redundancy, using HIPER-Ring or MRP Protocol, allows a single line structure network to be adapted to high-availability, ring-shaped network.

Ring/ Redundancy

RM – Ring Manager, switch that manages the connection to the redundant line Main line Redundant Line

RM



●This web page allows the selection of:● Redundancy protocol, either HIPER-Ring or MRP protocols

● Redundancy Manager mode

● Ring Recovery, standard or accelerated mode

Ring Redundancy


Redundancy

●Single Ring network, when cable break is detected, network recovers by automatically re-routed traffic

Single Ring Architecture


Ring Redundancy Protocol

HIPER-Ring Fast HIPER-Ring

MRP

Recovery Time – ConneXium -Standard or Basic Switches

300 or 500 ms for up to 50 switches

NA 200 or 500 ms for up to 50 switches

Recovery Time – ConneXium Extended Switches


25 ms for up to 50 switches


Recovery Times



●Coupling allows the connection of 2 rings or network segments using single or redundant switches.

● Single switch coupling, the redundant coupling is performed using 2 ports on a switch in the first ring/network, each port is connected to a port on 2 different switches in a second ring/network. One connection is the primary connection and the other is the stand-by connection.

● Redundant switch coupling, the redundant coupling is performed by 1 port each on the two switches on the first ring/network to 1 port each of 2 switches on the second ring/network. One connection is the primary connection and the other is the stand-by connection.

Ring/Network Coupling



●Single switch coupling network configuration● Ring coupling detects main line inoperable, the redundant line resumes the

communication typically within 150 ms (max. 500 ms )


Refer to the ConneXium Switch Redundancy Manual for other Ring/NetworkCoupling Configurations

RM

RM


Redundancy CapabilitiesRing/Network Coupling

●Two switch coupling network configuration ● Ring coupling detects main line inoperable, the redundant switch resumes the

communication via the redundant line typically within 150 ms (max. 500 ms)

Refer to the ConneXium Switch Redundancy Manual for other Ring/Network Coupling Configurations

RM

RM

Main Line Redundant Line



●This web page allows the selection of: ● Ring/Network coupling configurations.

● Port Selections

● Redundancy Modes

● Coupling Modes



Redundancy

●Dual Rings with Main Ring and Sub Rings connected by dual switches provide redundant connection between rings

Dual Ring Architecture

Main Ring(MRP)

Sub Ring(MRP)

Master

Slave



●A multiple connection network architecture that is used in a ring configuration

●On loss of a connection or switch, RSTP will reactivate a previously deactivated connection to maintain communications

●Root Bridge, switch that determines communication flow and link to deactivate

RSTP (Rapid Spanning Tree Protocol)

Root Bridge

Communication FlowCommunication Flow

Deactivated Link



●On loss of a communication link or switch, communication flow is automatically reconfigured and the deactivated link is reactivated to maintain communications.


Root Bridge

Communication FlowCommunication Flow

Broken Communication Link



●This web page allows the selection of the RSTP capability● MRP compatibility, maintains the fast switching times of MRP with RSTP

● Priority, sets local bridge priority combined with the switch MAC address are the bridge identification.

● Hello Time, in sec. between the sending of two configuration messages ● Forward Delay, transistion time between changing states (forwarding, blocking)

● Max Age, number of devices (max. branch length) to the root bridge



Redundancy

●Single Ring network, with connected devices, using RSTP


Single Ring(RSTP)


● Dual Power Source Connections for the Power Supply, allows the use of 2 separate power sources for redundancy.

RedundancyDual Power Supply Connections


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